diff --git a/foundations/09_convert_timezones/09_convert_timezones.md b/foundations/09_convert_timezones/09_convert_timezones.md
index 7f0b65e..b90c564 100644
--- a/foundations/09_convert_timezones/09_convert_timezones.md
+++ b/foundations/09_convert_timezones/09_convert_timezones.md
@@ -1,6 +1,6 @@
 # 09 Convert timestamps with timezones
 
-![Twitter Badge](https://img.shields.io/badge/Flink%20Version-1.19%2B-lightgrey)
+![Twitter Badge](https://img.shields.io/badge/Flink%20Version-1.9%2B-lightgrey)
 
 > :bulb: In this recipe, you will learn how to consolidate timestamps with different time zones to UTC.